International Day Against Nuclear Tests Observed on 29 August
Why in the news
The International Day Against Nuclear Tests is marked on 29 August. 2025 is the 16th observance, and it also falls in the 80th year since the world’s first nuclear test in 1945.
Key facts
- Date: 29 August every year.
- Resolution: A/RES/64/35, adopted by the 64th UN General Assembly on 2 December 2009; Kazakhstan introduced it.
- First observed: 29 August 2010.
- Why this date: it marks the closure of the Semipalatinsk Nuclear Test Site on 29 August 1991.
| Event | Date or figure |
|---|---|
| First nuclear test, Alamogordo, New Mexico | 16 July 1945 |
| Tests at Semipalatinsk | 456, from 1949 to 1989 |
| Site closed | 29 August 1991 |
| UNGA resolution | 2 December 2009 |
About Semipalatinsk
The Semipalatinsk Nuclear Test Site is in Kazakhstan. The world’s first nuclear test took place under the Manhattan Project.
Exam angle
- Observances are common static questions: 29 August.
- Link Kazakhstan with the resolution and the Semipalatinsk closure.
- The 2025 edition is the 16th.